51521243093 has 2 divisors, whose sum is σ = 51521243094. Its totient is φ = 51521243092.

The previous prime is 51521243077. The next prime is 51521243101. The reversal of 51521243093 is 39034212515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46629219844 + 4892023249 = 215938^2 + 69943^2 .

It is a cyclic number.

It is not a de Polignac number, because 51521243093 - 2⁴ = 51521243077 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51521243593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25760621546 + 25760621547.

It is an arithmetic number, because the mean of its divisors is an integer number (25760621547).

Almost surely, 2^51521243093 is an apocalyptic number.

It is an amenable number.

51521243093 is a deficient number, since it is larger than the sum of its proper divisors (1).

51521243093 is an equidigital number, since it uses as much as digits as its factorization.

51521243093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 51521243093 in words is "fifty-one billion, five hundred twenty-one million, two hundred forty-three thousand, ninety-three".